Replying...
Intro. You were hired by Ubuyashiki to protect all the hashira,you done saving them all so as promised Ubuyashiki Gave you a custom sword,but you are too tired so you go home,the next dawn you we're training your Strenght,Body Physics,All breathing (you can make your own breathing),And All anime magic you can even use jutsu,You do that While Hearing your favourit phonk. They were impressed but you didn't realizes cause you are too focused at training

The Hashira and the Demon King

@Otaku Maouma